Envelop.



L. B. BROWN.

ENVELOP.

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998,461. Patented July 18,1911.

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LENDER B. BROWN, OF LEXINGTON, KENTUCKY.

ENVELOP.

Specification of Letters Patent.

Patented July 18, 1911.

Application filed May 31, 1910. Serial No. 564,192.

.I '0 all whom it may concern:

Be it known that I, LENDER B. BROWN, a citizen of the United States,residing at Lexington, in the county of Fayette, State of Kentucky, haveinvented certain, new and useful Improvements in Envelops; and I dohereby declare the following to be a full, clear, and exact descriptionof the invention, such as will enable others skilled in the art to whichit appertains to make and use the same.

This invention relates to that class of envelops or wrappers that aredesigned to prevent the opening of the same without detection.

The object of this invention is to so construct and seal the envelop orwrapper that it can not be opened without disturbing both the stamp andaddress to a degree that will afford ample evidence that the sealing hasbeen tampered with.

With the above object in view, the invention consists of the noveldetails of construction and combination of parts hereinafter fullydescribed and claimed, it being understood that various modificationsmay be made in the minor details of construction within the scope of theappended claim.

In the accompanying drawings forming part of this specification :Figure1 shows the blank from which my improved envelo is formed. Fig. 2 showsthe right and left flaps folded upon the body of the envelop and theirlocking tabs locked. Fig. 3 shows the back of the envelop body foldedupon the right and left flaps and the tongues of the back interlockedwith the front of the envelop. Fig. 4 shows the sealing flap of theenvelop folded upon the back. Fig. 5 shows an enlarged cross sectionalview through the line 55, Fig. 1.

Referring now to the drawings, the numeral 10 designates the front, 11the back,

. 12 the right flap, 13 the left flap, and 14 the sealing flap of theenvelop.

Formed adjacent the apex of the right flap is an approximately cordatecut 15 which forms a cordate tab 16 which is capable of being bent backat its base 17 to lie flat against the under side of the flap 13 whenthe flap is in folded position. This is clearly shown in Fig. 2.

Formed adjacent the apex of the left flap is an approximately cordatecut 18 which forms a cordate tab 19, this tab having a pair of arcuateslits 20 formed adjacent its apex and extending from its edge to nearlythe center of the tab. By these slits the tab is divided into a majorportion, which will be hereinafter referred to as a base portion 21,

and a minor portion, which will be hereinafter referred to as the tipportion 22. The base portion of the tab is designed to be bent at itsroot 23 to engage the outer face of the flap 12 when the latter isfolded upon the front of the envelop, and the tip portion of the tab isadapted to be bent at its root 24 upon the outer face of the baseportion after the latter has been bent as above described.

This may clearly be seen by referring to Fig. 2.

In foldin the right and left flaps upon the front 0 the envelop body,the left flap is first folded down upon the front, then the right flapis folded down upon the left flap and the tab 16 of the right flap engaed through the cordate cut 18 of the left ap and bent back to on age theinner face of the left flap. The ta 19 of the left flap is now insertedthrough the cordate cut 15 of the right flap and its base portion 21folded back to engage the outer face of the right flap, the tip portion22 of the tabnow being bent back upon the base portion of the tab. Itmay here be stated that both faces of the tip portion are gummed so thatwhen the tip ortion is bent back upon the base portion It will adhere tothe latter and also to the back 11 of the envelop.

The back 11 is provided on its free edge with a pair of tongues 24: andthe sealing flap 14 of the envelop is provided with a pair of slots 25which permit of these tongues being engaged through the sealing fiap andbent to lie flat against the front 10 of the envelop. This is clearlyshown in Fig. 3.

Formed in the front of the envelop adj acent each of its side edges is aseries of slits 26, each series comprising three slits. The free ends ofthe tongues are inserted through the slits next adjacent to the sealingflap of the envelop and passed on the reverse side of the envelop front,thence passed through the intermediate slit of the series and passedforwardly to the front face of the envelop front, thence finally passedthrough the final slit of the series and enaged upon the reverse side ofthe envelop front. The sealing flap is gummed as shown at 27. The finaloperation of sealing the envelop is performed by bending the sealingflap to engage the back of the envelop and pressing its moistenedadhesive surface against the envelop back. The postage stamp is nowstuck upon the upper corner of the envelop front and overlaps one of thetongues as shown.

What is claimed is An envelop comprisin a front, fastening flaps on theside edges 0 the front foldable thereupon, one of said flaps having acut forming an approximately cordate tab adjacent to its free end, themating flap having a cut forming an approximately cordate tab adjacentto its free end, the last named tab bein gummed on one face and furtherbeing muti ated by inwardly extending slits in its edges dividing thetab into tip and base portions, the flaps bein folded one upon theother, the tabs of eac flap being engaged in opposite directions throughthe cuts of the flaps with the mutilated tab outermost, the tip portionof said mutilated tab being bent back upon the base portion thereof,said envelo further including a back upon one longitudinal edge of thefront, the gummed faces of the base and tip portions of said tab beingsecured to the first named flap and to said back respectively, and asealing flap on the opposite longitudinal edge of said back adapted tofold upon the latter.

In testimony whereof, I aflix my signature, in presence of tWoWitnesses.

LENDER B. BROWN. Witnesses:

MARY E. FAIN, MINNIE B. THOMAS.

Copies of this patent may be obtained for five cents each, by addressingthe "Commissioner of Patents. Washington, D. C.

